Property (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 28, 2022	Dec. 29, 2021	Dec. 30, 2020
Property, Plant and Equipment
Total property	$ 247,803	$ 243,012
Less accumulated depreciation	153,334	151,836
Property, net	94,469	91,176
Property held under finance leases, leased to franchisees, net	6,499	7,709
Depreciation expense, including amortization of property under finance leases	12,800	13,300	$ 13,200
Franchise
Property, Plant and Equipment
Total property	91,108	94,848
Less accumulated depreciation	57,253	60,674
Property, net	33,855	34,174
Buildings held under finance leases, leased to franchisees	7,047	8,060
Less accumulated amortization	4,339	4,781
Property held under finance leases, leased to franchisees, net	2,708	3,279
Total property leased to franchisees, net	36,563	37,453
Land
Property, Plant and Equipment
Total property	42,374	43,742
Land | Franchise
Property, Plant and Equipment
Total property	23,825	25,192
Buildings and leasehold improvements
Property, Plant and Equipment
Total property	164,782	163,264
Buildings and leasehold improvements | Franchise
Property, Plant and Equipment
Total property	67,283	69,656
Other property and equipment
Property, Plant and Equipment
Total property	$ 40,647	$ 36,006